Description: Astromania 2" Narrowband H-Beta Filter Product Details Product Dimensions: 2.79 x 2.74 x 0.56 inches Item Weight: 0.5 ounces Item model number: SKU_AM_HF2 Is Discontinued By Manufacturer: No Manufacturer: Astromania Brand: Astromania Material: metal Photo Filter Thread Size: 51 Centimeters Coating Description: Multi Coating Photo Filter Effect Type: Enhancing Water Resistance Level: Not Water Resistant Product Dimensions: 2"L x 2"W Filter with metal mount (2") and M48 filter threads on both sides. Executes with a transmission of over 90% and completely rejects light pollution. Have extremely high transmissions, while completely rejecting light pollution as well as the important blocking of longer wavelengths. Substrate is fine-optically polished plane parallel to deliver a smooth and accurate 1/4 wavefront over the entire surface. One of our High Transmission (HT) precision range of filters, this 2" H-Beta Filter is sure to impress on performance, quality and price. It comes with its own individual data sheet of performance - guaranteed! It is an extremely useful filter for observing the very feint nebulae. It has a very limited transmission range of 484 - 490nm (70%) and 478 - 483 & 492- 497nm (60+%). The very sharp cut offs only allow the hydrogen beta light that these feint objects emit to pass through. By cutting off almost all of the visual spectrum the filter effectively blackens the sky to make these objects show through. This filter is best used on large aperture telescopes (8" +) under very good seeing conditions and is an essential item for those astronomers who enjoy tracking down the most elusive of deep space objects. This is a filter for visual observational use.
Price: 105.43 USD
Location: Brooklyn, New York
End Time: 2024-11-14T23:56:48.000Z
Shipping Cost: 0 USD
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Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
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Material: metal
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Item Weight: 0.5 ounces
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Product Dimensions: 2.79 x 2.74 x 0.56 inches
Item model number: SKU_AM_HF2
Is Discontinued By Manufacturer: No
Manufacturer: Astromania
Brand: Astromania
MPN: SKU_AM_HF2
